\relax 
\@writefile{toc}{\contentsline {section}{\numberline {1}Announcements}{1}}
\@writefile{toc}{\contentsline {section}{\numberline {2}Problems}{1}}
\newlabel{ex:ell2}{{1}{1}}
\newlabel{ex:singgrp}{{2}{1}}
\newlabel{ex:ell4}{{3}{1}}
\newlabel{ex:ell11}{{4}{1}}
\newlabel{ex:elltrans}{{5}{2}}
\newlabel{ex:ell13}{{6}{2}}